linux-imx

/*

 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of version 2 of the GNU General Public License as

 * published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * General Public License for more details.

 */

#include <linux/libnvdimm.h>

#include <linux/badblocks.h>

#include <linux/export.h>

#include <linux/module.h>

#include <linux/blkdev.h>

#include <linux/device.h>

#include <linux/ctype.h>

#include <linux/ndctl.h>

#include <linux/mutex.h>

#include <linux/slab.h>

#include <linux/io.h>

#include "nd-core.h"

#include "nd.h"

​

LIST_HEAD(nvdimm_bus_list);

DEFINE_MUTEX(nvdimm_bus_list_mutex);

​

void nvdimm_bus_lock(struct device *dev)

{

    struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);

​

    if (!nvdimm_bus)

        return;

    mutex_lock(&nvdimm_bus->reconfig_mutex);

}

EXPORT_SYMBOL(nvdimm_bus_lock);

​

void nvdimm_bus_unlock(struct device *dev)

{

    struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);

​

    if (!nvdimm_bus)

        return;

    mutex_unlock(&nvdimm_bus->reconfig_mutex);

}

EXPORT_SYMBOL(nvdimm_bus_unlock);

​

bool is_nvdimm_bus_locked(struct device *dev)

{

    struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);

​

    if (!nvdimm_bus)

        return false;

    return mutex_is_locked(&nvdimm_bus->reconfig_mutex);

}

EXPORT_SYMBOL(is_nvdimm_bus_locked);

​

struct nvdimm_map {

    struct nvdimm_bus *nvdimm_bus;

    struct list_head list;

    resource_size_t offset;

    unsigned long flags;

    size_t size;

    union {

        void *mem;

        void __iomem *iomem;

    };

    struct kref kref;

};

​

static struct nvdimm_map *find_nvdimm_map(struct device *dev,

        resource_size_t offset)

{

    struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);

    struct nvdimm_map *nvdimm_map;

​

    list_for_each_entry(nvdimm_map, &nvdimm_bus->mapping_list, list)

        if (nvdimm_map->offset == offset)

            return nvdimm_map;

    return NULL;

}

​

static struct nvdimm_map *alloc_nvdimm_map(struct device *dev,

        resource_size_t offset, size_t size, unsigned long flags)

{

    struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);

    struct nvdimm_map *nvdimm_map;

​

    nvdimm_map = kzalloc(sizeof(*nvdimm_map), GFP_KERNEL);

    if (!nvdimm_map)